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Zeng R, Zhou F, Wang Y, Liao Z, Qian S, Luo Q, Zheng J. Polydopamine modified colloidal gold nanotag-based lateral flow immunoassay platform for highly sensitive detection of pathogenic bacteria and fast evaluation of antibacterial agents. Talanta 2024; 278:126525. [PMID: 38991406 DOI: 10.1016/j.talanta.2024.126525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 06/28/2024] [Accepted: 07/07/2024] [Indexed: 07/13/2024]
Abstract
Bacterial infection is a great threat to human health. Lateral flow immunoassays (LFIAs) with the merits of low cost, quick screening, and on-site detection are competitive technologies for bacteria detection, but their detection limits depend on the optical performance of the adopted nanotags. Herein, we presented a LFIA platform for bacteria detection using polydopamine (PDA) functionalized Au nanoparticles (denoted as Au@PDA) as the nanotag. The introduction of PDA could provide enhanced light absorption of Au, as well as numerous functional groups for conjugation. Small recognition molecules i.e. vancomycin (Van) and p-mercaptophenylboronic acid (PMBA) were covalently anchored to Au@PDA, and selected as the specific probes towards Gram-positive (G+) and Gram-negative (G-) bacteria, respectively. Taken Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) as the representative targets of G+ and G- bacteria, two LFA strips were successfully constructed based on the immuno-sandwich principle. They could quantitatively detect S. aureus and E. coli both down to 102 cfu/mL, a very competitive detection limit in comparison with other colorimetric or luminescent probes-based LFIAs. Furthermore, the proposed two strips were applied for the quantitative, accurate, and rapid detection of S. aureus and E. coli in food and human urine samples with good analytical results obtained. In addition, they were integrated as a screening platform for quick evaluation of diverse antibacterial agents within 3 h, which is remarkably shortened compared with that of the two traditional methods i.e. bacterial culture and plate-counting.
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Affiliation(s)
- Ruoxi Zeng
- Ningbo Key Laboratory of Biomedical Imaging Probe Materials and Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, PR China; Ningbo Cixi Institute of Biomedical Engineering, Ningbo, 315302, PR China
| | - Fangfang Zhou
- Department of Nephrology, Ningbo No. 2 Hospital, Ningbo, 315010, PR China
| | - Yuhui Wang
- Ningbo Key Laboratory of Biomedical Imaging Probe Materials and Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, PR China; Ningbo Cixi Institute of Biomedical Engineering, Ningbo, 315302, PR China.
| | - Zixuan Liao
- Ningbo Key Laboratory of Biomedical Imaging Probe Materials and Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, PR China; Ningbo Cixi Institute of Biomedical Engineering, Ningbo, 315302, PR China
| | - Sihua Qian
- Ningbo Key Laboratory of Biomedical Imaging Probe Materials and Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, PR China; Ningbo Cixi Institute of Biomedical Engineering, Ningbo, 315302, PR China
| | - Qun Luo
- Department of Nephrology, Ningbo No. 2 Hospital, Ningbo, 315010, PR China.
| | - Jianping Zheng
- Ningbo Key Laboratory of Biomedical Imaging Probe Materials and Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, PR China; Ningbo Cixi Institute of Biomedical Engineering, Ningbo, 315302, PR China.
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Kara N, Ayoub N, Ilgu H, Fotiadis D, Ilgu M. Aptamers Targeting Membrane Proteins for Sensor and Diagnostic Applications. Molecules 2023; 28:molecules28093728. [PMID: 37175137 PMCID: PMC10180177 DOI: 10.3390/molecules28093728] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 04/07/2023] [Accepted: 04/19/2023] [Indexed: 05/15/2023] Open
Abstract
Many biological processes (physiological or pathological) are relevant to membrane proteins (MPs), which account for almost 30% of the total of human proteins. As such, MPs can serve as predictive molecular biomarkers for disease diagnosis and prognosis. Indeed, cell surface MPs are an important class of attractive targets of the currently prescribed therapeutic drugs and diagnostic molecules used in disease detection. The oligonucleotides known as aptamers can be selected against a particular target with high affinity and selectivity by iterative rounds of in vitro library evolution, known as Systematic Evolution of Ligands by EXponential Enrichment (SELEX). As an alternative to antibodies, aptamers offer unique features like thermal stability, low-cost, reuse, ease of chemical modification, and compatibility with various detection techniques. Particularly, immobilized-aptamer sensing platforms have been under investigation for diagnostics and have demonstrated significant value compared to other analytical techniques. These "aptasensors" can be classified into several types based on their working principle, which are commonly electrochemical, optical, or mass-sensitive. In this review, we review the studies on aptamer-based MP-sensing technologies for diagnostic applications and have included new methodological variations undertaken in recent years.
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Affiliation(s)
- Nilufer Kara
- Department of Biological Sciences, Middle East Technical University, Ankara 06800, Turkey
| | - Nooraldeen Ayoub
- Department of Biological Sciences, Middle East Technical University, Ankara 06800, Turkey
- Institute of Biochemistry and Molecular Medicine, University of Bern, CH-3012 Bern, Switzerland
| | - Huseyin Ilgu
- Institute of Biochemistry and Molecular Medicine, University of Bern, CH-3012 Bern, Switzerland
| | - Dimitrios Fotiadis
- Institute of Biochemistry and Molecular Medicine, University of Bern, CH-3012 Bern, Switzerland
| | - Muslum Ilgu
- Department of Biological Sciences, Middle East Technical University, Ankara 06800, Turkey
- Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, IA 50011, USA
- Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, IA 50011, USA
- Aptalogic Inc., Ames, IA 50014, USA
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Nooranian S, Mohammadinejad A, Mohajeri T, Aleyaghoob G, Kazemi Oskuee R. Biosensors based on aptamer-conjugated gold nanoparticles: A review. Biotechnol Appl Biochem 2021; 69:1517-1534. [PMID: 34269486 DOI: 10.1002/bab.2224] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 07/13/2021] [Indexed: 12/14/2022]
Abstract
Simply synthetized gold nanoparticles have been highly used in medicine and biotechnology as a result of their biocompatibility, conductivity, and being easily functionalized with biomolecules such as aptamer. Aptamer-conjugated gold nanoparticle structures synergically possess characteristics of both aptamer and gold nanoparticles including high binding affinity, high biocompatibility, enhanced target selectivity, and long circulatory half-life. Aptamer-conjugated gold nanoparticles have extensively gained considerable attention for designing of biosensing systems due to their interesting optical and electrochemical features. Moreover, biosensors based on aptamer-gold nanoparticles are easy to use, with fast response, and inexpensive which make them ideal in individualized medicine, disease markers detection, food safety, and so forth. Moreover, due to high selectivity and biocompatibility of aptamer-gold nanoparticles, these biosensing platforms are ideal tools for targeted drug delivery systems. The application of this nanostructure as diagnostic and therapeutic tool has been developed for detection of cancer in the early stage by detecting cancer biomarkers, pathogens, proteins, toxins, antibiotics, adenosine triphosphate, and other small molecules. This review obviously demonstrates that this nanostructure effectively is applicable in the field of biomedicine and possesses potential of commercialization aims.
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Affiliation(s)
- Samin Nooranian
- Department of Medical Biotechnology and Nanotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Arash Mohammadinejad
- Targeted Drug Delivery Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Taraneh Mohajeri
- Department of Obstetrics & Gynecology, Mashhad Medical Sciences Branch, Islamic Azad University, Mashhad, Iran
| | - Ghazaleh Aleyaghoob
- Department of Medical Biotechnology and Nanotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Reza Kazemi Oskuee
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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4
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Zhang F, Liu J. Label‐Free Colorimetric Biosensors Based on Aptamers and Gold Nanoparticles: A Critical Review. ACTA ACUST UNITED AC 2020. [DOI: 10.1002/anse.202000023] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Fang Zhang
- College of Biological Science and Engineering Fuzhou University Fuzhou 350108 People's Republic of China
- Department of Chemistry Waterloo Institute for Nanotechnology University of Waterloo Waterloo N2 L 3G1 Ontario Canada
| | - Juewen Liu
- Department of Chemistry Waterloo Institute for Nanotechnology University of Waterloo Waterloo N2 L 3G1 Ontario Canada
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Logic Gates Based on DNA Aptamers. Pharmaceuticals (Basel) 2020; 13:ph13110417. [PMID: 33238657 PMCID: PMC7700249 DOI: 10.3390/ph13110417] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/19/2020] [Accepted: 11/20/2020] [Indexed: 02/08/2023] Open
Abstract
DNA bio-computing is an emerging trend in modern science that is based on interactions among biomolecules. Special types of DNAs are aptamers that are capable of selectively forming complexes with target compounds. This review is devoted to a discussion of logic gates based on aptamers for the purposes of medicine and analytical chemistry. The review considers different approaches to the creation of logic gates and identifies the general algorithms of their creation, as well as describes the methods of obtaining an output signal which can be divided into optical and electrochemical. Aptameric logic gates based on DNA origami and DNA nanorobots are also shown. The information presented in this article can be useful when creating new logic gates using existing aptamers and aptamers that will be selected in the future.
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Zhang F, Huang PJJ, Liu J. Sensing Adenosine and ATP by Aptamers and Gold Nanoparticles: Opposite Trends of Color Change from Domination of Target Adsorption Instead of Aptamer Binding. ACS Sens 2020; 5:2885-2893. [PMID: 32847353 DOI: 10.1021/acssensors.0c01169] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The 27 mer DNA aptamer for adenosine and adenosine 5'-triphosphate (ATP) is a popular model system for designing biosensors. Various strategies have been reported for label-free colorimetric detection using gold nanoparticles (AuNPs). It is generally accepted that free aptamers can protect AuNPs against salt-induced aggregation, whereas target-bound aptamers cannot. However, these studies only considered the aptamer binding to its target, and the adsorption of the aptamer on AuNPs, but none considered the adsorption of target molecules by AuNPs. We herein report that the adsorption of adenosine destabilized citrate-capped AuNPs with an apparent Kd of just 7.7 μM adenosine, whereas that of ATP stabilized the AuNPs because of the negative charges from the triphosphate group. The adsorbed ATP inhibited the adsorption of DNA. Using the aptamer and a nonbinding mutant, ATP and guanosine 5'-triphosphate (GTP) had the same colorimetric response, and so did adenosine and guanosine, regardless of the DNA sequence, indicating that the color change mainly reflected the adsorption of the nucleosides and nucleotides instead of aptamer binding. The related literature examples using this aptamer were classified into three types and individually analyzed, where the reported color changes can all be explained by the adsorption of target analytes.
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Affiliation(s)
- Fang Zhang
- College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, People’s Republic of China
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo N2L 3G1, Ontario, Canada
| | - Po-Jung Jimmy Huang
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo N2L 3G1, Ontario, Canada
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo N2L 3G1, Ontario, Canada
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Zhu R, Song J, Zhou Y, Lei P, Li Z, Li HW, Shuang S, Dong C. Dual sensing reporter system of assembled gold nanoparticles toward the sequential colorimetric detection of adenosine and Cr(III). Talanta 2019; 204:294-303. [PMID: 31357297 DOI: 10.1016/j.talanta.2019.05.085] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 05/13/2019] [Accepted: 05/20/2019] [Indexed: 01/15/2023]
Abstract
A facile and sensitive sequential colorimetric detection strategy for adenosine and Cr3+ has been presented by using the aptamer and 11-mercaptoundecanoic acid assembled gold nanoparticles. The thiolated DNA and 11-mercaptoundecanoic acid was simultaneously assembled to the surface of gold nanoparticles in one step by gold-sulfur interaction. Adenosine aptamer was linked to functionalized gold nanaoparticles based on the strict complementary nature of the DNA base pairs. Conformational change of aptamer will be induced due to its specific binding with targets. As a result, this aptamer tethered aggregated nanoparticles underwent fast disassembly into dispersed nanoparticles upon binding of adenosine, and this distance change between particles induced a distinct solution color changing from blue to red. The dispersed particles were sensitive to Cr3+ due to the chelation effect between the carboxyl group of 11-mercaptoundecanoic acid and metal ions, and further occurred obvious aggregation accompanying with a color change from red to blue. Depended on this principle, a sensitive and selective sequential colorimetric sensor for detection of adenosine and Cr3+ was developed. The proposed colorimetric sensor exhibited wide linear ranges and low detection limits towards the detection of adenosine and Cr3+. Regarding adenosine, linear range was 1 × 10-7 ∼ 1 × 10-4 M with low detection limit of 1.8 × 10-8 M, and the naked eye detection limit was estimated as 20 μM. With regard to Cr3+, good linear relationship was ranged from 1 × 10-10 to 1 × 10-6 M with low detection limit of 1.7 × 10-11 M,and the naked eye detection limit was as low as 0.1 nM. Meanwhile, bifunctional recognition was successfully used for practical human urine samples with good recoveries from 89.0% to 112.6% for adenosine and 90.2%-113.4% for Cr3+. It also highlights the potential applications of other aptamers and ligands in cascade analysis of other analytes.
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Affiliation(s)
- Ruiqi Zhu
- Institute of Environment Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China
| | - Jinping Song
- College of Chemistry and Environmental Engineering, and Institute of Applied Chemistry, Shanxi Datong University, Datong, 037009, China.
| | - Ying Zhou
- Institute of Environment Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China
| | - Peng Lei
- Institute of Environment Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China
| | - Zhongping Li
- Institute of Environment Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China
| | - Hung-Wing Li
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Shaomin Shuang
- Institute of Environment Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China
| | - Chuan Dong
- Institute of Environment Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China.
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8
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Samanta A, Gangopadhyay R, Ghosh CK, Ray M. Enhanced photoluminescence from gold nanoparticle decorated polyaniline nanowire bundles. RSC Adv 2017. [DOI: 10.1039/c7ra01124e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Enhanced emission is observed from a nanocomposite consisting of conducting polyaniline nanowire bundles decorated with gold nanoparticles synthesized by simple physical blending and in situ interfacial polymerization techniques.
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Affiliation(s)
- Aniruddha Samanta
- School of Materials Science and Engineering
- Indian Institute of Engineering Science and Technology
- Howrah 711103
- India
| | - Rupali Gangopadhyay
- Centre for Advanced Materials
- Indian Association for the Cultivation of Science
- Kolkata 700032
- India
| | - Chandan Kumar Ghosh
- School of Materials Science and Nanotechnology
- Jadavpur University
- Kolkata 700032
- India
| | - Mallar Ray
- School of Materials Science and Engineering
- Indian Institute of Engineering Science and Technology
- Howrah 711103
- India
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9
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Ultrasensitive and Signal-on Electrochemiluminescence Aptasensor Using the Multi-tris(bipyridine)ruthenium(II)-β-cyclodextrin Complexes. CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201400511] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Pradhan T, Jung HS, Jang JH, Kim TW, Kang C, Kim JS. Chemical sensing of neurotransmitters. Chem Soc Rev 2014; 43:4684-713. [DOI: 10.1039/c3cs60477b] [Citation(s) in RCA: 156] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
This review focuses on the chemosensors for neurotransmitters published for the last 12 years, covering biogenic amines (dopamine, epinephrine, norepinephrine, serotonin, histamine and acetylcholine), amino acids (glutamate, aspartate, GABA, glycine and tyrosine), and adenosine.
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Affiliation(s)
- Tuhin Pradhan
- Department of Chemistry
- Korea University
- Seoul 130-701, Korea
- Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology
- and Department of Chemistry
| | - Hyo Sung Jung
- Department of Chemistry
- Korea University
- Seoul 130-701, Korea
| | - Joo Hee Jang
- Department of Chemistry
- Korea University
- Seoul 130-701, Korea
| | - Tae Woo Kim
- The East-West Medical Science
- Kyung Hee University
- Yongin 446-701, Korea
| | - Chulhun Kang
- The East-West Medical Science
- Kyung Hee University
- Yongin 446-701, Korea
| | - Jong Seung Kim
- Department of Chemistry
- Korea University
- Seoul 130-701, Korea
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Zhang J, Liu B, Liu H, Zhang X, Tan W. Aptamer-conjugated gold nanoparticles for bioanalysis. Nanomedicine (Lond) 2013; 8:983-93. [DOI: 10.2217/nnm.13.80] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Aptamers are single-stranded oligonucleotides synthesized through an in vitro selection and amplification process that involves systematic evolution of ligands by exponential enrichment. Based on their high binding affinity and specificity towards other molecules, aptamers generated during the final rounds of selection can be utilized in applications ranging from biosensing to diagnostics and therapeutics. Meanwhile, advances in nanotechnology have led to new and improved materials for biomedical applications. Specifically, nanoparticles can readily interact with both intra- and extra-cellular biomolecules to yield improved signal amplification and target recognition. By combining both technologies, aptamer-conjugated nanoparticles, especially gold nanoparticles (Apt–AuNPs), offer great promise for applications in bioanalysis and biomedicine, including early diagnosis and drug delivery. This review summarizes recent methodologies that have increased the application of Apt–AuNPs in biomedicine, and discusses the potential of Apt–AuNPs in bioanalysis.
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Affiliation(s)
- Jiani Zhang
- Xiangya Hospital, Central South University, PO Box 190, Changsha, Hunan 410008, China
| | - Bo Liu
- Xiangya Hospital, Central South University, PO Box 190, Changsha, Hunan 410008, China
| | - Huixia Liu
- Xiangya Hospital, Central South University, PO Box 190, Changsha, Hunan 410008, China.
| | - Xiaobing Zhang
- Molecular Science & Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing & Chemometrics, College of Biology & College of Chemistry & Chemical Engineering, Collaborative Innovation Center for Chemistry & Molecular Medicine, Hunan University, Changsha 410082, China
| | - Weihong Tan
- Molecular Science & Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing & Chemometrics, College of Biology & College of Chemistry & Chemical Engineering, Collaborative Innovation Center for Chemistry & Molecular Medicine, Hunan University, Changsha 410082, China
- Center for Research at Bio/Nano Interface, Department of Physiology & Functional Genomics, Shands Cancer Center, UF Genetics Institute & McKnight Brain Institute, University of Florida, Gainesville, FL 32611-7200, USA
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Lönne M, Zhu G, Stahl F, Walter JG. Aptamer-modified nanoparticles as biosensors. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2013; 140:121-54. [PMID: 23824145 DOI: 10.1007/10_2013_231] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Aptamers are short oligonucleotides that are capable of selectively binding to their corresponding target. Therefore, they can be thought of as a nucleic acid-based alternative to antibodies and can substitute for their amino acid-based counterparts in analytical applications, including as receptors in biosensors. Here they offer several advantages because their nucleic acid nature and their binding via an induced fit mechanism enable novel sensing strategies. In this article, the utilization of aptamers as novel bio-receptors in combination with nanoparticles as transducer elements is reviewed. In addition to these analytical applications, the medical relevance of aptamer-modified nanoparticles is described.
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Affiliation(s)
- Maren Lönne
- Institut für Technische Chemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstr. 5, 30167, Hannover, Germany
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McKeague M, Foster A, Miguel Y, Giamberardino A, Verdin C, Chan JYS, DeRosa MC. Development of a DNA aptamer for direct and selective homocysteine detection in human serum. RSC Adv 2013. [DOI: 10.1039/c3ra43893g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Liu Y, Yu J, Chen W, Liu D, Wang Z, Jiang X. Cu2+Detection with Gold Nanoparticles by Patterning Colorimetric Strips on a Filter Membrane Assembled in a Microfluidic Chip. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201200655] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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15
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Saha K, Agasti SS, Kim C, Li X, Rotello VM. Gold nanoparticles in chemical and biological sensing. Chem Rev 2012; 112:2739-79. [PMID: 22295941 PMCID: PMC4102386 DOI: 10.1021/cr2001178] [Citation(s) in RCA: 2755] [Impact Index Per Article: 229.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Krishnendu Saha
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
| | - Sarit S. Agasti
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
| | - Chaekyu Kim
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
| | - Xiaoning Li
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
| | - Vincent M. Rotello
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
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Hu P, Zhu C, Jin L, Dong S. An ultrasensitive fluorescent aptasensor for adenosine detection based on exonuclease III assisted signal amplification. Biosens Bioelectron 2012; 34:83-7. [PMID: 22382074 DOI: 10.1016/j.bios.2012.01.022] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2011] [Revised: 01/11/2012] [Accepted: 01/17/2012] [Indexed: 12/21/2022]
Abstract
We report here a graphene oxide (GO)-based fluorescent aptasensor for adenosine detection by employing exonuclease III (Exo III) as a signal amplifying element. In the absence of adenosine, the adenosine aptamers hybridized with the complementary DNA (cDNA), and the Exo III could not cleave the single-strand signal probes labeled with carboxylfluorescein (FAM) at its 5' ends. When the graphene oxide was finally added, it could strongly adsorb the single-strand signal probes and quenched the fluorophore effectively. In the presence of adenosine, the aptamers associated with the targets, which led to the formation of duplex DNAs between the cDNAs and the signal probes. The Exo III thereafter could digest the duplex DNAs from 3' blunt terminus of signal probes, liberating the fluorophore. Upon adding the GO, the fluorophore could not be adsorbed and quenched. By coupling cyclic enzymatic cleavage, a remarkable fluorescent increase was obtained. Due to the specific recognition ability of the aptamer for the target and the powerful quenching property of GO for signal probe, this proposed approach has a good selectivity and high sensitivity for adenosine. In the optimum conditions described, >100% signal enhancement was achieved and a limit of detection as low as 1 nM was obtained, which is lower than those of commonly used fluorescent aptamer sensors. Moreover, the biosensor exhibited an ultrahigh sensitivity and held a versatile platform for clinical diagnostics, molecular biology and drug developments.
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Affiliation(s)
- Peng Hu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, PR China
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18
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Hu Y, Zhang Y, Tang Y. One-step hydrothermal synthesis of surface organosilanized nanozeolite under microwave irradiation. Chem Commun (Camb) 2010; 46:3875-7. [DOI: 10.1039/c002551h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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